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Removing organic and nitrogen content from a highly saline municipal wastewater reverse osmosis concentrate by UV/H2O2-BAC treatment.
Chemosphere. 2015 Oct; 136:198-203.C

Abstract

Reverse osmosis (RO) concentrate (ROC) streams generated from RO-based municipal wastewater reclamation processes pose potential health and environmental risks on their disposal to confined water bodies such as bays. A UV/H2O2 advanced oxidation process followed by a biological activated carbon (BAC) treatment was evaluated at lab-scale for the removal of organic and nutrient content from a highly saline ROC (TDS 16 g L(-1), EC 23.5 mS cm(-1)) for its safe disposal to the receiving environment. Over the 230-day operation of the UV/H2O2-BAC process, the colour and UV absorbance (254 nm) of the ROC were reduced to well below those of the influent to the reclamation process. The concentrations of DOC and total nitrogen (TN) were reduced by approximately 60% at an empty bed contact time (EBCT) of 60 min. The reduction in ammonia nitrogen by the BAC remained high under all conditions tested (>90%). Further investigation confirmed that the presence of residual peroxide in the UV/H2O2 treated ROC was beneficial for DOC removal, but markedly inhibited the activities of the nitrifying bacteria (i.e., nitrite oxidising bacteria) in the BAC system and hence compromised total nitrogen removal. This work demonstrated that the BAC treatment could be acclimated to the very high salinity environment, and could be used as a robust method for the removal of organic matter and nitrogen from the pre-oxidised ROC under optimised conditions.

Authors+Show Affiliations

School of Civil, Environmental and Chemical Engineering, RMIT University, Melbourne, Victoria 3001, Australia.School of Civil, Environmental and Chemical Engineering, RMIT University, Melbourne, Victoria 3001, Australia. Electronic address: linhua.fan@rmit.edu.au.School of Civil, Environmental and Chemical Engineering, RMIT University, Melbourne, Victoria 3001, Australia.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

26002159

Citation

Pradhan, Shovana, et al. "Removing Organic and Nitrogen Content From a Highly Saline Municipal Wastewater Reverse Osmosis Concentrate By UV/H2O2-BAC Treatment." Chemosphere, vol. 136, 2015, pp. 198-203.
Pradhan S, Fan L, Roddick FA. Removing organic and nitrogen content from a highly saline municipal wastewater reverse osmosis concentrate by UV/H2O2-BAC treatment. Chemosphere. 2015;136:198-203.
Pradhan, S., Fan, L., & Roddick, F. A. (2015). Removing organic and nitrogen content from a highly saline municipal wastewater reverse osmosis concentrate by UV/H2O2-BAC treatment. Chemosphere, 136, 198-203. https://doi.org/10.1016/j.chemosphere.2015.05.028
Pradhan S, Fan L, Roddick FA. Removing Organic and Nitrogen Content From a Highly Saline Municipal Wastewater Reverse Osmosis Concentrate By UV/H2O2-BAC Treatment. Chemosphere. 2015;136:198-203. PubMed PMID: 26002159.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removing organic and nitrogen content from a highly saline municipal wastewater reverse osmosis concentrate by UV/H2O2-BAC treatment. AU - Pradhan,Shovana, AU - Fan,Linhua, AU - Roddick,Felicity A, Y1 - 2015/05/22/ PY - 2015/03/14/received PY - 2015/05/07/revised PY - 2015/05/12/accepted PY - 2015/5/24/entrez PY - 2015/5/24/pubmed PY - 2016/2/27/medline KW - Advanced oxidation processes KW - Biological activated carbon KW - Nitrogen removal KW - Organic matter removal KW - Reverse osmosis concentrate KW - Wastewater reclamation SP - 198 EP - 203 JF - Chemosphere JO - Chemosphere VL - 136 N2 - Reverse osmosis (RO) concentrate (ROC) streams generated from RO-based municipal wastewater reclamation processes pose potential health and environmental risks on their disposal to confined water bodies such as bays. A UV/H2O2 advanced oxidation process followed by a biological activated carbon (BAC) treatment was evaluated at lab-scale for the removal of organic and nutrient content from a highly saline ROC (TDS 16 g L(-1), EC 23.5 mS cm(-1)) for its safe disposal to the receiving environment. Over the 230-day operation of the UV/H2O2-BAC process, the colour and UV absorbance (254 nm) of the ROC were reduced to well below those of the influent to the reclamation process. The concentrations of DOC and total nitrogen (TN) were reduced by approximately 60% at an empty bed contact time (EBCT) of 60 min. The reduction in ammonia nitrogen by the BAC remained high under all conditions tested (>90%). Further investigation confirmed that the presence of residual peroxide in the UV/H2O2 treated ROC was beneficial for DOC removal, but markedly inhibited the activities of the nitrifying bacteria (i.e., nitrite oxidising bacteria) in the BAC system and hence compromised total nitrogen removal. This work demonstrated that the BAC treatment could be acclimated to the very high salinity environment, and could be used as a robust method for the removal of organic matter and nitrogen from the pre-oxidised ROC under optimised conditions. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/26002159/Removing_organic_and_nitrogen_content_from_a_highly_saline_municipal_wastewater_reverse_osmosis_concentrate_by_UV/H2O2_BAC_treatment_ DB - PRIME DP - Unbound Medicine ER -